/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMModel/RigVMController.h
Removes any orphan pins that no longer holds a link
bool RemoveUnusedOrphanedPins ( [URigVMNode](API\Plugins\RigVMDeveloper\RigVMModel\URigVMNode) * InNode, bool bRelayLinks )